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<p>Provides classes and interfaces for encoding the input channels associated 
with a graph, and for matching particular spans of the input with lexemes in a 
lexicon. </p>

<h2>Package Specification</h2>

<p>Examples of input channels include the text in a parsing problem, 
the source and target text in parallel parsing, and the source text in translation.
Other multimodal types of input channels could potentially be added to this package as well, 
such as raw speech signals, probability-weighted word or phoneme lattices produced 
by a speech recognizer, or channels representing hand or face gestures.</p>

<p>The most important operation that is performed on the input layer, is the 
ability to detect lexemes from a given lexicon in the input. This operation must 
be carried out by a special InputLexiconMatcher object. </p>

<h2>Related Documentation</h2>

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